Active tone control (CB9373E)

This circuit is from a Radio Electronics from the 90's. The integrated circuit is from the time and the boost gain is 20 dB.

| Clique na imagem para ampliar |

Airflow detector (CB7427E)
Found in a Popular Electronics from the 1990s, this circuit uses components from National...
Logarithmic Polarization Source (CB6594E)
This circuit delivers at its output a voltage that proportional to the amplitude of the input...
Locked Alarm (CB4872E)
This simple circuit uses an SCR to lock the alarm once triggered. The circuit is from an English...